package zisu.netty.practice.netty.simple;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @Desc: ""
 * @Author: caixiang
 * @DATE: 2020/7/8 14:03
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {
    //当通道就绪的时候 就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("client:"+ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello server...", CharsetUtil.UTF_8));
    }

    //当通道有读取事件时，会触发
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务器回复的消息："+buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器地址："+ctx.channel().remoteAddress());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
